Indian (Imperial) Police

The Indian Imperial Police, referred to variously as the Indian (Imperial) Police or simply the Indian Police or, by 1905,Imperial Police (IP), was part of the Indian Police Services (IPS), the uniform system of police administration in British India, as established by India Act 5 of 1861.

Its members ruled more than 300 million people in India, Pakistan, Bangladesh and Burma (then comprising British Raj).

In 1948, a year after India's independence from Britain, the Imperial Police Service (IPS) was replaced by the Indian Police Service, which had been constituted as part of the All-India Services by the Constitution.

It comprised two branches, the Superior Police Services, from which the Indian (Imperial) Police would later be formed, and the Subordinate Police Service. Until 1893, appointments to the senior grades (i.e., Assistant District Superintendent and above) were made locally in India, mainly from European officers of the Indian Army.

The highest rank in the service was the Inspector General for each province. The rank of Inspector General was equated and ranked with Brigadier and similar ranks in the Indian Armed Forces, as per Central Warrant of Precedence in 1937. After the Inspector General, the ranks were made up of District Superintendents and Assistant District Superintendents (ADS), most of whom were appointed, from 1893, by examination for the Indian Civil Service (ICS) exams in the UK. The Subordinate Police Service consisted of Inspectors, Sub-Inspectors, Head Constables (or Sergeant in the City forces and cantonments) and Constables, mainly consisting of Indians except for the higher ranks.

...
Wikipedia